Measuring instrument



y 1945. E. v. STATIA, SR 2,376,453

MEASURING INSTRUMENT Filed April I 19 1943 3nventor Ed win V s'iaiicr Sr W ww- J LV Qttomeg Patented May 22, 1945 UNEIRT EWSTATE MEKSIJRJING INSTRUIWEN I" v Edwinivastatia Sr.,..Royal ak, lvfi ch, ass ignorh of one-half. to. Edward L Chapman; Detn0it,.

Mich.

AipplicaticmAprihm, 1943, Serial No. 4 83,559 w morain (ores-185i The present invention relates to measuring "instruments and more particularly, to: awcenter gauge f'or' cutting tools; I g

The primary: object of the l invention is: toi provide a, gauge for determining the center line of grinding. Wheel ldressing toolswso: as toi-locateithe center of the: diamond point: when settirrg -the dresser for operationiuponiaipiece of work: or while dressing. the contour of ag-rindingwheeletoi facile itate extreme accuracy and precision; the finishe'd product. 1 1

Another? object of the; invention: is: to provide a centerfgauge of the?above-mentionedtype which i will. quickly. "andveasilyv'positl'ozr therdiamondspoint cutting tool on an absolute center;- line: regardless of the: extent of wear ofthe: diamond? pointer its shape from wear. i

Another-obj ectof the. inventions-is: tox provide a gauge .whi'chrwill. bezreadilwaccessible and may at all times heravailab'le for use and whiclrwi ll elimi- 'inate the; use: of extensive. calculatiorr and; comeu;

putation in locating. the exact: position at; the dresser toolpcenter line withirespectato a reiierence point or base; a v i i Other objects: and i advantages; of the invention will become apparent during thacourse ofthe following description: of theaccompanyingidrawing, wherein; n i i i i- Figured isaisideelevational'viewiof the gauge illustrating. apreierredembodiment ofi the invention and showing; the manner in which: theigauge may bapresentedto; a-..dr.esser cutterzfor deter mining the;- center line; thereof;. 3 Figure. 2 is; a horizontal. cross sectionalxview taken on line. 2;2- of Figurer lrlookingz in. the

direction. of the arrows and. illustrating the gauge groove. and the: manner inwhich itisinoreasing-ly enlarged throng-1:361): degrees. of. are

Figure. 3 is a side elevationaliview Gf fir l'l'lfldi' fiedqform' of" theinvention illustrating individual openings or conical recesses of various sizes for receiving the dressing tool; and

Figure 4 is a horizontal cross sectional view taken on line 44 in Figure 3 illustrating the manner in which the gauge is presented to the diamond point of a dressing tool for determing the exact and absolute center line thereof.

In the drawing wherein for the purpose of illustrating the invention and wherein like reference characters will be employed to designate like parts throughout the same, the reference character 5 in Figures 1 and 2 will generally be employed to designate a rounded vertical standard having a pedestal or base portion 6 with a relatively flat bottom wall I undercut as at 8 to facilitate the easyslidingmovement of the base 5 upon a relatively hat or plane surface. The round" standard 5? is knurledas at" auntermediate itslength tofacil'itate rotation: thereofi during use about the axis ofthe centers I 0 and H. The extreme upper end of' the vertical standard 5 is rounded asat I2 {10- provide a finished appearance.- i i Spaced slightly below the rounded upper edge which gradually increasetlirougn 360" degrees; ofarc: The centerline- I6 of the groove is absolutely horizontal and isperpendicula-rto a line between the centers I H" and H L 'I he walls M and" I5 of the groovefaresubstantially: at an angle of60- degrees with respect toone another to-producethe best results. i i

It is to benoted that the groovel3 shown in Figures '1 and 2 gradually increases from a peripheral point on the vertical standard 5 in one direction and terminates at this peripheral point-=18 in an abrupt shoulder as-shown in FigureZi In' use, the vertical standard 5 is presented to a dressing tool T'having' adiamond p'oint D so that the diamond point will beireceived therein. By rotating the 'vertical standard! 5: until a snug" fit is obtained between the diamond 'reference 'to" apredetermined height from the base or bed upon whi'ch the cutting: tooliT is supported! Bygrasping the knurled portion *9 the vertical standard 5 may be easily rotaited and since the apex IS of the groove is a predetermined heightfrom the bottom wall 1* the exact and absolute location of' the centenline extending through the diamond point D in a horizontal plane maybe, determined. As shown in Figure 1, the diamond pointD- isprovided with a relatively Sharp point but-uporruse it has point D is a predetermined distance above the bed or base from the reference point I.

In Figures 3 and 4, a slightly modified form of the invention is shown and the reference char-- acter 5a Will generally be employed to designate a vertical standard having a base portion 6a adapted to rest upon a machine bed or work table. The base 641 is provided with a relatively flat bottom wall 1a undercut as at 8a to provide a relatively stable support for the vertical standard a and insure the same extending perpendicular to a base upon which the device is supported. The intermediate portion of thevertical standard 5a is knurled as at 90, so that the operator may grasp the vertical standard and convenient.-.

ly locate the same while the base la is resting upon a substantially fiat plane surface. The lathe centers Illa and I la at opposite ends of the gauge define a line absolutelyperpendicular to the bottom wall Ia and provide for accuracy in determining the center line of a grinding dressing tool or other cutting tool.

Formed at a predetermined distance above the bottom wall la and adjacent the upper end of the vertical standard 5a is a series of conical recesses 13a gradually increasing in size and depth about 360 degrees on substantially the same gradient as the groove l3 shown in Figs, 1 and 2t The conical openings or recesses l3a are adapted to receive the diamond point D of a dresser tool T for determining the center line of said diamond point D when setting the dresser to its zero marking to various reference points. In other words, the center line of the diamond point D will be a predetermined height above the work surface when the diamond point D is snugly received in one of the conical recesses 13a so that by settin the dressing tool indicator at its zero marking the operator will know with a high degree of accuracy the amount of adjustment to impart axis thereof at a predetermined distance above the surface of the base.

3. A gauge for determining the center line of dressing cutters comprising a base having a relatively plane bottom wall adapted to rest on a true surface, a vertical standard formed on the base and extending perpendicular thereto, said vertical standard having formed adjacent the upper end thereof gauging surfaces having sloping Walls gradually increasing in depth about the circumference of said standard, the apex of said sloping walls being a predetermined height above the bottom wall of the base to receive the diamondpoint of a cutting tool.

4. A gauge for determining the center line of dressing tools, comprising a round base having a substantially plane bottom wall surface, a vertical standard projecting above the base having formed therein an annular groove increasing in depth about an arc of 360 degrees, the apex of said groove being substantially horizontal and perpendicular to the vertical standard for receiving the diamond point of a dressing tool to determine the center line thereof.

5. A gauge for determining the center line of grinding wheel dressing tools comprising a base having a relatively plane bottom wall surface, a vertical standard formed integral with the base, said vertical standard having a groove formed in the upper end thereof a predetermined height from the base bottom wall portion, said groove being increased about an arc of 360 degrees and to the dressing tool T with the center line as a v reference point for said adjustments.

It is to be understood that the forms invention herewith shown and described are to be taken as preferred embodiments of the same and'that various changes in the shape, size and arrangement of parts may be resorted to without of the" departing from the spirit of the invention or the scope of the subjoined claims.

What I claim is: a 1. A gauge for determining the center line of dressing tools, comprising a base, a perpendicular member formed on the base, said perpendicular member having gauging surfaces gradually increasing in depth about said perpendicular member adapted toreceive the end of said dressing tool for determining the center line thereof.

a 2. A gauge for determining the center line of a dressing tool, comprising a base having a plane bottom surface adapted to rest upon a work bed,

a vertical standard extending perpendicular to;

the base and diamond point gauging surfaces having sloping Walls gradually increasing in depth, said gauging surfaces being formed in the upper end of said vertical standard about the having its apex center line absolutely horizontal and perpendicular to the vertical standard for receiving the diamond point of a cutting tool of various sizes and shapes.

6. A gauge for determining the center line of I cutting tools, comprising a base having a relatively fiat bottom wall, a vertical standard extending upwardly from the base and a series of conical recesses formed on the peripheral surface of said vertical standard a predetermined distance above the base, said recesses being gradually increased through 360 degrees around the periphery of the vertical standard.

'7. A gauge for determining the center line of grinding wheel dressing tools comprising a base having a relatively flat bottom wall surface, a round vertical standard extending upwardlyfrom the base having a knurled intermediate portion and a series of gradually increasing conical recesses formed in the upper end of the vertical standard adapted to receive the diamond point 

